n =3 same
as n =2, plus additional information
about any proven or assumed dependences.

Usage

If you use -c, -ipo
with -vec_report{n} option or -c,
-x{K|W|N|B|P} or -ax{K|W|N|B|P}
with -vec_report{n}, the compiler issues a warning
and no report is generated.

To produce a report when using the aforementioned options, you need
to add the -ipo_obj option. The combination of
-c and -ipo_obj produces
a single file compilation, and hence does generate object code, and eventually
a report is generated.